#include "stdio.h"
#define  PI  3.14159

int  main()  
{
	//第1题	
	
	int a, b, c;  
	a = 3;
	/********** Begin **********/
	b = 2;
				
	/********** End **********/			
				
	c = 5; 
	/********** Begin **********/
	printf("%d\n", (a + b) * c);
	
	/********** End **********/
	
	//第2题
	
	/********** Begin **********/
	int num;
				 
	/********** End **********/
				 
	scanf("%d",&num);
    printf("The result is: %d\n",num);

	//第3题
	
	float r,area;

	scanf("%f",&r);
	
	/********** Begin **********/
	area= r * r * PI;
	
	/********** End **********/
	
	/********** Begin **********/
	printf("area = %f\n", area);
	
	/********** End **********/
	
	return 0;
}
